Flask Async

Flask (Python) server that allows non-blocking execution AFTER response returns. It's hacky but it works (unlike asyncio 😡).

Install (macOS)

brew install python3
pip3 install Flask

Start

FLASK_APP=server.py /Library/Frameworks/Python.framework/Versions/3.6/bin/flask run

Browse to http://localhost:5000/

You will see messages printed in this order:

received request
blocking
responding
non-blocking with args ['foo' '123']

Note: includes both blocking and non-blocking code.